Hi Dan,
I find your definition of "Alpha-Beta rollouts" somewhat puzzling.
> Alpha-beta rollouts is like MCTS without playouts (as in
> AlphaZero), and something that can also do alpha-beta pruning.
I would instead define "Alpha-Beta rollout" in the following way:
You have a fast alpha-beta program (with some randomness) for
that game, and a rollout means a quick selfplay game of this
program.
Ingo.